US2572064A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of controlling shrinkage of castings
Assignee: Solar Aircraft Co
•
Filing: 1948-11-22
•
Granted: 1951-10-23
•
Expires: 1968-11-22
Abstract
No abstract record available.
Inventors
- 👤 William C Slinkard
- 👤 Frank L Duncan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:41
CPC Classifications
B; B22; B22C; B22C9/00; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49972
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2264038A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-10-22 | 1955-04-23 | 1955-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-22 | 1959-04-23 | 1959-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-22 | 1963-04-23 | 1963-10-23 | $7700.00 | Window Closed / Lapsed |